Changing keyboard from ps/2 to USB

[John]

Hi,

I'm having an issue with keyboard installation. I have a
MS Internet Keyboard Pro (with usb hub) that is plugged
into both the PS/2 connector and one USB slot. Yesterday,
I wanted to replace it with just a standard USB keyboard.
If I boot with just the USB keyboard, I get to the windows
loading screen, then a bluescreen with
IRQL_LESS_THAN_OR_EQUAL. I re-install the PS/2 keyboard
connection, and WinXPHome loads just fine. I can connect
the USB keyboard after WinXp loads, and it works just fine.

Didn't have much time to mess with it yesterday, due to
storms, but what can I do to troubleshoot this?

Thanks!